Currently I am building a system to control my ESS system. Basically it is something like DESS. I use modbus to read and write settings. I managed to control all of the settings I want, except one: The switch for Limit inverter power under ESS.
I expected it to switch off when -1 is written to register 2704, similar to hte DVCC max charge current setting in 2705. But that is not how it works.
Does anyone know how to control this switch with modbus?
You are using ESS mode 2 ?
Did you also tried 2702 ?
Or the new 4922 in acsystem?
ESS mode is optimized without battery life.
2702 does not do the trick.
I believe 4922 does not control inverter power, it is about AC power.
Oh, sorry about 4922… I was thinking about something else… Sorry. 
I was talking about this below… I know, sometimes the names can be confusing…
In that case, it is mode 2. I can successfully change the grid power setpoint.
It really looks like the switch cannot be controlled via modbus. As a work around I select a very high limit when the power doesn’t need to be limited. It is not ideal as the position of the switch cannot be checked. The work around only works when the switch is in the on-position.